from tkinter import *

root = Tk()

v = IntVar()

Radiobutton(root, text='one', variable=v, value=1).pack(anchor=W)

Radiobutton(root, text='two', variable=v, value=2).pack(anchor=W)

Radiobutton(root, text='three', variable=v, value=3).pack(anchor=W)

Radiobutton(root, text='four', variable=v, value=4).pack(anchor=W)

mainloop()
